prime number
US /praɪm ˈnʌm.bɚ/
UK /praɪm ˈnʌm.bə/
名詞
質數, 素數
a whole number greater than 1 that cannot be exactly divided by any whole number other than itself and 1
範例:
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The number 7 is a prime number because it is only divisible by 1 and 7.
數字7是一個質數，因為它只能被1和7整除。
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Mathematicians are still searching for the largest known prime number.
數學家們仍在尋找已知最大的質數。